High-dielectric-strength shielding fireproof flame-retardant cable
By using a ceramicized silicone rubber insulation layer and a low-smoke halogen-free insulation reinforcement layer in the cable, combined with aluminum-plastic composite tape and guide wires, the problems of brittleness and expansion under high temperature and spraying of traditional fire-resistant cables are solved, and a shielded fire-resistant and flame-retardant cable with high dielectric strength, low smoke and high frequency interference protection is realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-13
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional fire-resistant cables are prone to brittle fracture and failure at high temperatures. Water absorption and expansion in spray environments lead to a decrease in insulation performance. Conventional flame-retardant sheath materials produce dense smoke and toxic gases when burning. Insufficient shielding coverage results in weak high-frequency interference protection.
It adopts a ceramicized silicone rubber insulation layer with an additional low-smoke halogen-free insulation reinforcement layer, and aluminum-plastic composite tape to achieve 100% shielding coverage. The conductor is integrated into the cable core, and a low-smoke halogen-free flame-retardant sheath is used.
It improves the insulation and tear resistance of the cable, ensures the stability of the cable in high temperature and spray environments, reduces the generation of smoke and toxic gases, and enhances the protection against high frequency interference.
Smart Images
Figure CN224052901U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of high dielectric strength shielding fire-retardant cable, belong to cable technical field. BACKGROUND
[0002] In recent years, with the improvement of global fire safety awareness and the perfection of relevant laws and regulations, the demand for fire-resistant cable continues to grow. Fire-resistant cable has the characteristics of flame-retardant fire resistance, high temperature resistance, corrosion resistance, radiation resistance, etc. compared with ordinary cable, and is more widely applicable. The importance of electrical fire protection and high-rise building fire protection in various industries continues to increase, and fire-resistant special cables have been widely used in high-rise buildings, shopping centers, star-rated hotels, hospitals and other densely populated places.
[0003] Traditional fire-resistant cable adopts mica tape wrapping structure, which is prone to brittle failure at high temperature, and water absorption and swelling in a spray environment, leading to a decrease in insulation performance. Conventional flame-retardant sheath materials produce a large amount of smoke and toxic halogen gas when burning, which does not meet the requirements of modern building safety standards. The shielding structure of the cable is mostly single-layer metal braid, which has the problems of insufficient shielding coverage (usually <85%) and weak high-frequency interference protection capability.
[0004] High electrical performance shielding fire-retardant cable is applied in high-rise buildings, shopping centers, star-rated hotels, hospitals and other densely populated places. It greatly improves the temperature resistance level of the cable, maintains long-term stable electrical performance, improves the cable's anti-aging performance, and prolongs the service life of the cable. This fire-resistant product is an effective measure to ensure the normal operation of critical electrical systems, mainly used in building fire detection and fire alarm systems, voice alarm systems, emergency voice communication, emergency and escape lighting, and control circuits with other fire resistance requirements, greatly ensuring the safety of people's lives and property. The cross-section of high electrical performance shielding fire-retardant cable is generally 0.75~6mm2. Currently, fire-resistant cable mostly has a mica wrapping fire-resistant layer wrapped outside the conductor, but it is prone to brittle failure and falls off at a temperature above 800℃, losing the insulation protection function, and absorbs water and swells (swelling rate >30%) in a spray environment, leading to a sudden drop in insulation resistance (<0.1 MΩ). The design of a ceramicized silicone gel fire-resistant layer structure outside the conductor improves the above performance, but the silicone gel contacts sharp metal during installation, which can cause cracks, leading to damage to the insulation layer at the wiring point, affecting the electrical performance of the cable and also causing a safety hazard of electric leakage. SUMMARY
[0005] The utility model discloses a high dielectric strength shielding fireproof flame-retardant cable, which is characterized in that a high-strength low-smoke halogen-free insulation reinforcing layer is extruded outside a ceramicized silicone rubber insulation layer, so that the ceramicized silicone rubber insulation layer can maintain the fireproof advantage and the ceramicized silicone rubber insulation layer can be protected from being cut and damaged by sharp objects during installation.
[0006] The utility model discloses a technical scheme:
[0007] The utility model discloses a high dielectric strength shielding fireproof flame-retardant cable, which is characterized in that a high-strength low-smoke halogen-free insulation reinforcing layer is extruded outside a ceramicized silicone rubber insulation layer, so that the ceramicized silicone rubber insulation layer can maintain the fireproof advantage and the ceramicized silicone rubber insulation layer can be protected from being cut and damaged by sharp objects during installation.
[0008] Further, the cable conductor is composed of tin-plated copper conductor of type 1 or type 2.
[0009] Further, the flow guide wire is a tin-plated copper conductor.
[0010] The utility model has high dielectric strength, high temperature resistance and other characteristics. It is applied to building fire detection and fire alarm system, voice alarm system, emergency voice communication, emergency and escape lighting, and control circuit with other fire resistance requirements.
[0011] The utility model has the following advantages: the ceramicized silicone rubber insulation layer and the low-smoke halogen-free insulation reinforcing layer are extruded outside the conductor, so that the ceramicized silicone rubber insulation layer can maintain the fireproof advantage and the ceramicized silicone rubber insulation layer can be protected from being cut and damaged by sharp objects during installation, and the insulation comprehensive protection performance and tear resistance of the cable are improved. The shielding layer is made of aluminum plastic composite tape, and the flow guide wire is placed under the aluminum plastic composite tape, so that the shielding continuity and 100% coverage are ensured, the anti-interference ability is improved, the shielding impedance is reduced, the shielding efficiency is improved, the stability of telecommunication signal transmission and power transmission is ensured, and the above-mentioned problems existing in the background art are solved. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 The utility model discloses a structure schematic view;
[0013] In the drawing: cable conductor 1, ceramicized silicone rubber insulation layer 2, low-smoke halogen-free insulation reinforcing layer 3, aluminum plastic composite tape 4, flow guide wire 5, low-smoke halogen-free flame-retardant sheath 6. DETAILED DESCRIPTION
[0014] The utility model will be further explained in connection with the drawings and embodiments:
[0015] Referring to the drawings Figure 1 The embodiment provides a high dielectric strength shielding fire-resistant flame-retardant cable, which comprises a cable conductor 1, a ceramicized silicone rubber insulation layer 2, a low-smoke halogen-free insulation reinforcing layer 3, an aluminum-plastic composite tape 4, a current-carrying wire 5 and a low-smoke halogen-free flame-retardant sheath 6, the cable conductor 1 is sequentially coated with the ceramicized silicone rubber insulation layer 2 and the low-smoke halogen-free insulation reinforcing layer 3 to form an insulated core, two insulated cores are longitudinally cabled into the current-carrying wire 5 and then wrapped with the aluminum-plastic composite tape 4, and the aluminum-plastic composite tape 4 is coated with the low-smoke halogen-free flame-retardant sheath 6.
[0016] In the embodiment:
[0017] The cable conductor 1 is composed of a copper-plated conductor of class 1 or class 2 in accordance with the GB / T3956 standard.
[0018] The conductor is coated with the ceramicized silicone rubber insulation layer 2, and the thickness of the ceramicized silicone rubber insulation layer 2 is uniform.
[0019] The ceramicized silicone rubber insulation layer 2 is coated with a high-strength low-smoke halogen-free insulation reinforcing layer 3, which effectively insulates the inner layer and improves the service life and electrical properties of the cable on the basis of ensuring good electrical insulation properties.
[0020] The shielding layer adopts the aluminum-plastic composite tape 4, 100% shielding coverage, the current-carrying wire is a tinned copper conductor, the current-carrying wire is cabled into the cable core, the anti-interference ability is improved, the shielding impedance is reduced, and the shielding effectiveness is improved.
[0021] The low-smoke halogen-free flame-retardant sheath 6 has good mechanical properties and comprehensive protection properties. Conventional flame-retardant sheath materials produce a large amount of smoke and toxic halogen gas when burning, and the cable releases toxic gases such as hydrogen chloride and carbon monoxide when burning, the smoke is thick, which seriously reduces the insulation of the equipment and the wiring loop, and threatens and affects the safe operation of the electrical equipment. The sheath of the utility model adopts a low-smoke halogen-free low-toxicity environmentally friendly material, improves the electrical safety in daily life, is suitable for building fire detection and fire alarm systems, voice alarm systems, emergency voice communication, emergency and escape lighting, and control circuits with other fire resistance requirements.
Claims
1. A high dielectric strength, shielded, fire resistant, flame retardant cable characterized by: The cable comprises a cable conductor (1), a ceramicized silicone rubber insulation layer (2), a low-smoke halogen-free insulation reinforcing layer (3), an aluminum-plastic composite tape (4), a current-carrying wire (5) and a low-smoke halogen-free flame-retardant sheath (6), the cable conductor (1) is sequentially coated with the ceramicized silicone rubber insulation layer (2) and the low-smoke halogen-free insulation reinforcing layer (3) to form an insulated core, a plurality of insulated cores are cabled and inserted into the current-carrying wire (5) and then wrapped with the aluminum-plastic composite tape (4), and the aluminum-plastic composite tape (4) is coated with the low-smoke halogen-free flame-retardant sheath (6).
2. A high dielectric strength shielded fire resistant and flame retardant cable according to claim 1, characterized in that: The cable conductor (1) is a tinned 1-type or 2-type copper conductor.
3. A high dielectric strength, shielded, fire resistant, flame retardant cable according to claim 1 or 2, characterized in that: The current-carrying wire (5) is a tinned copper conductor.